Table 2 Mean and standard deviation values of scanning laser polarimetry parameters in the teaching and validating sets

From: Scanning laser polarimetry: logistic regression analysis for perimetric glaucoma diagnosis

GDx-VCC parameters Teaching set Validating set
  Normal group Glaucomatous group P* Normal group Glaucomatous group P*
  Mean/SD Mean/SD   Mean/SD Mean/SD  
TSNIT average 56.69/6.11 46.51/8.66 <0.001 56.90/7.62 48.78/7.62 <0.001
Superior average 67.68/7.64 54.27/11.85 <0.001 67.77/8.99 57.78/11.08 <0.001
Inferior average 66.05/8.96 51.64/11.89 <0.001 66.61/10.64 55.15/10.61 <0.001
TSNIT standard deviation 22.69/5.12 16.13/4.82 <0.001 23.11/3.59 17.06/5.51 <0.001
NFI 15.06/8.18 41.62/22.41 <0.001 15.90/7.47 35.51/20.54 <0.001
Superior ratio 3.20/1.19 2.25/0.89 <0.001 3.20/1.06 2.34/0.83 0.002
Inferior ratio 3.35/1.22 2.31/0.82 <0.001 3.22/0.96 2.46/0.81 0.003
Superior/nasal 2.25/0.58 2.00/0.50 0.014 2.39/0.69 2.07/0.51 0.033
Maximum modulation 2.52/1.18 1.62/0.79 <0.001 2.53/0.90 1.67/0.83 0.001
Superior maximum 78.57/12.08 64.62/13.80 <0.001 82.60/15.59 67.58/12.67 <0.001
Inferior maximum 82.68/12.60 67.39/14.81 <0.001 83.44/12.65 71.23/12.88 <0.001
Image average 51.24/6.90 44.28/8.68 <0.001 51.62/8.47 46.11/6.79 0.011
Ellipse modulation 4.00/1.78 2.78/1.31 <0.001 4.20/1.53 2.64/1.17 <0.001
Normalized superior area 0.13/0.02 0.09/0.03 <0.001 0.13/0.02 0.11/0.02 0.001
Normalized inferior area 0.14/0.02 0.10/0.03 <0.001 0.14/0.02 0.11/0.02 <0.001
Temporal/nasal 076/0.26 0.96/0.28 <0.001 0.71/0.23 0.92/0.24 0.001
Inferior/nasal 2.35/0.57 2.08/0.45 0.003 2.44/0.59 2.10/0.49 0.014
Total integral 0.53/0.05 0.44/0.07 <0.001 0.53/0.07 0.47/0.05 <0.001
Superior integral 0.20/0.02 0.16/0.03 <0.001 0.20/0.02 0.18/0.02 <0.001
Inferior integral 0.20/0.02 0.16/0.03 <0.001 0.21/0.03 0.17/0.02 0.001
Temporal average 27.62/12.05 30.87/11.79 0.133 29.67/13.70 30.26/7.45 0.842
Nasal average 44.50/7.63 36.22/7.97 <0.001 42.25/7.22 36.32/6.87 0.003
Our LDF 0.96/1.79 −2.39/1.87 <0.001 0.68/1.42 −2.06/1.54 <0.001
  1. GDx-VCC, scanning laser polarimetry with variable corneal compensation; LDF, linear discriminant function; NFI, nerve fiber indicator; TSNIT, temporal-superior-nasal-inferior-temporal.
  2. *Significant differences (P<0.05) in Student's t-test between normal and glaucomatous groups for each population.